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Reading the LEDs
The LEDs indicate the current operating condition of the router. You can observe the LEDs,
note any fault condition that the router is encountering, and then contact your system
administrator or customer service, if necessary. For information about how to contact
customer service, refer to the section "Obtaining Service and Support" in the "Overview of
the Router" chapter.
Figure A-1 to Figure A-7 show the location of the LEDs on the rear panel of the routers.
The power LED, at the right of the auxiliary port, lights up when the system is working
properly. All of the other LEDs indicate activity by flickering. When there is heavy activity
on a port, the LED might be ON constantly. If an LED is not ON when the port is active
and the cable is connected correctly, there might be a problem with the port.
Figure A-1
Ethernet
AUI LED
Figure A-2
Token Ring
LED
Model 2501 LEDs
Synchronous
System
serial LEDs
OK LED
Model 2502 LEDs
Synchronous
System
serial LEDs
OK LED
Reading the LEDs
Troubleshooting the Router A-3
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Troubleshooting
